Technetium (Tc)

Technetium is the 43rd element in the periodic table and has a symbol of Tc and atomic number of 43. It has an atomic weight of (97.90721) and a mass number of 83. Technetium has forty-three protons and forty neutrons in its nucleus, and forty-three electrons in five shells. It is located in group seven, period five and block d of the periodic table. Radioactive metallic transition element. Can be detected in some stars and the fission products of uranium. First made by Perrier and Segre by bombarding molybdenum with deutrons, giving them Tc-97. Tc-99 is the most stable isotope with a half-life of 2.6*10^6 years. Sixteen isotopes are known. Organic technetium compounds are used in bone imaging. Chemical properties are intermediate between rhenium and manganese.

Atomic Number	43
Atomic Weight	97.90721
Mass Number	83

Group	7
Period	5
Block	d

Protons	43 p⁺
Neutrons	40 n⁰
Electrons	43 e^-

Properties

Physical Properties
Atomic Radius	135 pm 252 pm
Molar Volume	8.5 cm³/mol
Covalent Radius	128 pm 120 pm 110 pm 147 pm
Metallic Radius	127 pm 136 pm
Ionic Radius	64.5 pm 60 pm 37 pm 56 pm
Crystal Radius	78.5 pm 74 pm 51 pm 70 pm
Van der Waals Radius	205 pm 216 pm 236 pm 299.8 pm
Density	11 g/cm³
Energy
Proton Affinity
Electron Affinity	0.55 eV/particle
Ionization Energy	7.119381 eV/particle 15.26 eV/particle 29.55 eV/particle 41 eV/particle 57 eV/particle 72 eV/particle 88 eV/particle 150 eV/particle 169 eV/particle 189.9 eV/particle 214 eV/particle 239 eV/particle 262.08 eV/particle 311 eV/particle 338.55 eV/particle 604 eV/particle 655 eV/particle 713 eV/particle 773 eV/particle 829 eV/particle 904 eV/particle 968 eV/particle 1,032 eV/particle 1,102 eV/particle 1,166 eV/particle 1,354 eV/particle 1,411.6 eV/particle 1,479.5 eV/particle 1,559 eV/particle 1,638 eV/particle 1,689 eV/particle 1,838 eV/particle 1,900.28 eV/particle 4,505 eV/particle 4,681 eV/particle 4,874 eV/particle 5,060 eV/particle 5,361 eV/particle 5,570 eV/particle 5,838 eV/particle 6,008.391 eV/particle 25,004.532 eV/particle 25,786.99 eV/particle

Heat of Vaporization	585 kJ/mol
Heat of Fusion	23.8 kJ/mol
Heat of Formation	678 kJ/mol
Electrons
Electron Shells	2, 8, 18, 13, 2

Valence Electrons	2 ⓘ

Electron Configuration	[Kr] 4d⁵ 5s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 4d⁵ 5s²

Oxidation States	-3, -1, 0, 1, 2, 3, 4, 5, 6, 7
Electronegativity	8.94 eV/particle 0.1344592 2.1
Electrophilicity Index	1.1191961031633155 eV/particle
States of Matter
Phase	Solid
Gas Phase
Boiling Point	4,535.15 K
Melting Point	2,430.15 K
Critical Pressure
Critical Temperature
Triple Point
Visual
Technetium is a Silver. Tc has a CPK of #ff1493, Jmol of #3b9e9e, and MOLCAS GV of #3b9e9e. The Appearance of Element 43 is shiny gray metal.
Color	Silver #ff1493 #3b9e9e #3b9e9e
Appearance	shiny gray metal
Refractive Index
Thermodynamic Properties
Thermal Conductivity	50.6 W/(m K)
Thermal Expansion
Molar Heat Capacity
Specific Heat Capacity
Heat Capacity Ratio (Adiabatic Index)
Electrical Properties
Type	Conductor
Electrical Conductivity	5 MS/m
Electrical Resistivity	0.0000002 m Ω
Superconducting Point	7.7 K
Magnetism
Type	paramagnetic
Magnetic Susceptibility (Mass)	0.0000000342 m³/Kg
Magnetic Susceptibility (Molar)	0.000000003352 m³/mol
Magnetic Susceptibility (Volume)	0.0003933
Magnetic Ordering
Curie Point
Neel Point
Structure
The Crystal Structure of Technetium is HEX. The lattice constant of Tc is 2.74 Å. The lattice angles of Element 43 are π/2, π/2, 2 π/3.
Crystal Structure	Simple Hexagonal (HEX)
Lattice Constant	2.74 Å
Lattice Angles	π/2, π/2, 2 π/3
Mechanical Properties

Hardness
Bulk Modulus
Shear Modulus
Young's Modulus
Poisson Ratio
Speed of Sound
Classification
The CAS Group of Technetium is VIIA. The IUPAC Group of Tc is VIIB. The Glawe Number of Element 43 is 59. The Mendeleev Number of Technetium (Tc) is 56. The Pettifor Number of Technetium is 58. The Goldschmidt Class of Tc is synthetic.
Category	Transition metals, Transition metals
CAS Group	VIIA
IUPAC Group	VIIB
Glawe Number	59
Mendeleev Number	56
Pettifor Number	58
Geochemical Class
Goldschmidt Class	synthetic
Other
The Dipole Polarizability of Technetium is 79 plus or minus 10 a₀. Tc has a C6 Dispersion Coefficient (GB) of 939 a₀. The Allotropes of Element 43 is . The Neutron Cross Section of Technetium (Tc) is 22. The Quantum Numbers of Technetium is 6S5/2. The Space Group of Tc is 194 (P63/mmc).
Gas Basicity
Dipole Polarizability	79 ± 10 a₀
C6 Dispersion Coefficient	939 a₀
Allotropes
Neutron Cross Section	22
Neutron Mass Absorption
Quantum Numbers	6S5/2
Space Group	194 (P63/mmc)

Isotopes of Technetium

Stable Isotopes	0
Unstable Isotopes	40
Radioactive Isotopes	40

⁸³Tc

Mass Number	83
Neutron Number	40
Relative Atomic Mass	82.966377 ± 0.000537 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life
Spin	1/2
Quadrupole Moment	0
Discovery Year
Parity	-

Decay Mode	Intensity
p (proton emission)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
β⁺ p (β⁺-delayed proton emission)

⁸⁴Tc

Mass Number	84
Neutron Number	41
Relative Atomic Mass	83.959527 ± 0.000429 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life
Spin	1
Quadrupole Moment
Discovery Year
Parity	+

Decay Mode	Intensity
p (proton emission)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
β⁺ p (β⁺-delayed proton emission)

⁸⁵Tc

Mass Number	85
Neutron Number	42
Relative Atomic Mass	84.950778 ± 0.000429 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life
Spin	1/2
Quadrupole Moment	0
Discovery Year
Parity	-

Decay Mode	Intensity
p (proton emission)

⁸⁶Tc

Mass Number	86
Neutron Number	43
Relative Atomic Mass	85.944637 ± 0.000322 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	55 ± 7 ms
Spin	0
Quadrupole Moment	0
Discovery Year	1992
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)

⁸⁷Tc

Mass Number	87
Neutron Number	44
Relative Atomic Mass	86.938067185 ± 0.0000045 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	2.14 ± 0.17 s
Spin	9/2
Quadrupole Moment
Discovery Year	1991
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	0.7%

⁸⁸Tc

Mass Number	88
Neutron Number	45
Relative Atomic Mass	87.933794211 ± 0.0000044 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	6.4 ± 0.8 s
Spin	2
Quadrupole Moment
Discovery Year	1991
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)

⁸⁹Tc

Mass Number	89
Neutron Number	46
Relative Atomic Mass	88.927648649 ± 0.0000041 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	12.8 ± 0.9 s
Spin	9/2
Quadrupole Moment
Discovery Year	1991
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁹⁰Tc

Mass Number	90
Neutron Number	47
Relative Atomic Mass	89.924073919 ± 0.0000011 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	49.2 ± 0.4 s
Spin	8
Quadrupole Moment
Discovery Year	1974
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁹¹Tc

Mass Number	91
Neutron Number	48
Relative Atomic Mass	90.918424972 ± 0.000002536 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	3.14 ± 0.02 m
Spin	9/2
Quadrupole Moment
Discovery Year	1974
Parity

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁹²Tc

Mass Number	92
Neutron Number	49
Relative Atomic Mass	91.915269777 ± 0.00000333 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	4.25 ± 0.15 m
Spin	8
Quadrupole Moment
Discovery Year	1964
Parity

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁹³Tc

Mass Number	93
Neutron Number	50
Relative Atomic Mass	92.910245147 ± 0.000001086 Da
G-Factor	1.4044444444444 ± 0.013333333333333
Abundance
Radioactivity	☢️ Radioactive
Half Life	2.75 ± 0.05 h
Spin	9/2
Quadrupole Moment
Discovery Year	1948
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁹⁴Tc

Mass Number	94
Neutron Number	51
Relative Atomic Mass	93.909652319 ± 0.00000437 Da
G-Factor	0.73142857142857 ± 0.0071428571428571
Abundance
Radioactivity	☢️ Radioactive
Half Life	293 ± 1 m
Spin	7
Quadrupole Moment
Discovery Year	1948
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁹⁵Tc

Mass Number	95
Neutron Number	52
Relative Atomic Mass	94.907652281 ± 0.000005453 Da
G-Factor	1.32 ± 0.013333333333333
Abundance
Radioactivity	☢️ Radioactive
Half Life	19.258 ± 0.026 h
Spin	9/2
Quadrupole Moment
Discovery Year	1947
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁹⁶Tc

Mass Number	96
Neutron Number	53
Relative Atomic Mass	95.907866675 ± 0.000005524 Da
G-Factor	0.72714285714286 ± 0.0071428571428571
Abundance
Radioactivity	☢️ Radioactive
Half Life	4.28 ± 0.07 d
Spin	7
Quadrupole Moment
Discovery Year	1947
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

⁹⁷Tc

Mass Number	97
Neutron Number	54
Relative Atomic Mass	96.90636072 ± 0.00000442 Da
G-Factor	1.2933333333333 ± 0.02
Abundance
Radioactivity	☢️ Radioactive
Half Life	4.21 ± 0.16 My
Spin	9/2
Quadrupole Moment
Discovery Year	1946
Parity	+

Decay Mode	Intensity
ϵ (electron capture)	100%

⁹⁸Tc

Mass Number	98
Neutron Number	55
Relative Atomic Mass	97.907211206 ± 0.000003628 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	4.2 ± 0.3 My
Spin	6
Quadrupole Moment
Discovery Year	1955
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	0%

⁹⁹Tc

Mass Number	99
Neutron Number	56
Relative Atomic Mass	98.906249681 ± 0.000000974 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	211.1 ± 1.2 ky
Spin	9/2
Quadrupole Moment	-0.129 ± 0.006
Discovery Year	1938
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁰⁰Tc

Mass Number	100
Neutron Number	57
Relative Atomic Mass	99.907652715 ± 0.00000145 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	15.46 ± 0.19 s
Spin	1
Quadrupole Moment
Discovery Year	1952
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
ϵ (electron capture)	0.0018%

¹⁰¹Tc

Mass Number	101
Neutron Number	58
Relative Atomic Mass	100.907305271 ± 0.000025768 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	14.22 ± 0.01 m
Spin	9/2
Quadrupole Moment
Discovery Year	1941
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁰²Tc

Mass Number	102
Neutron Number	59
Relative Atomic Mass	101.909207239 ± 0.00000984 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	5.28 ± 0.15 s
Spin	1
Quadrupole Moment
Discovery Year	1954
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁰³Tc

Mass Number	103
Neutron Number	60
Relative Atomic Mass	102.90917396 ± 0.000010531 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	54.2 ± 0.8 s
Spin	5/2
Quadrupole Moment
Discovery Year	1957
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁰⁴Tc

Mass Number	104
Neutron Number	61
Relative Atomic Mass	103.911433718 ± 0.000026716 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	18.3 ± 0.3 m
Spin	3
Quadrupole Moment
Discovery Year	1956
Parity	-

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁰⁵Tc

Mass Number	105
Neutron Number	62
Relative Atomic Mass	104.911662024 ± 0.000037856 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	7.64 ± 0.06 m
Spin	3/2
Quadrupole Moment
Discovery Year	1955
Parity	-

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁰⁶Tc

Mass Number	106
Neutron Number	63
Relative Atomic Mass	105.914356674 ± 0.00001315 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	35.6 ± 0.6 s
Spin	1
Quadrupole Moment
Discovery Year	1965
Parity

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁰⁷Tc

Mass Number	107
Neutron Number	64
Relative Atomic Mass	106.915458437 ± 0.00000931 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	21.2 ± 0.2 s
Spin	3/2
Quadrupole Moment
Discovery Year	1965
Parity	-

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁰⁸Tc

Mass Number	108
Neutron Number	65
Relative Atomic Mass	107.918493493 ± 0.000009413 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	5.17 ± 0.07 s
Spin	2
Quadrupole Moment
Discovery Year	1970
Parity

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁰⁹Tc

Mass Number	109
Neutron Number	66
Relative Atomic Mass	108.920254107 ± 0.00001038 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	905 ± 21 ms
Spin	5/2
Quadrupole Moment
Discovery Year	1976
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0.08%

¹¹⁰Tc

Mass Number	110
Neutron Number	67
Relative Atomic Mass	109.923741263 ± 0.000010195 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	900 ± 13 ms
Spin	2
Quadrupole Moment
Discovery Year	1976
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0.04%

¹¹¹Tc

Mass Number	111
Neutron Number	68
Relative Atomic Mass	110.925898966 ± 0.000011359 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	350 ± 11 ms
Spin	5/2
Quadrupole Moment
Discovery Year	1988
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0.85%

¹¹²Tc

Mass Number	112
Neutron Number	69
Relative Atomic Mass	111.929941658 ± 0.00000592 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	323 ± 6 ms
Spin	2
Quadrupole Moment
Discovery Year	1990
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	1.5%

¹¹³Tc

Mass Number	113
Neutron Number	70
Relative Atomic Mass	112.932569032 ± 0.0000036 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	152 ± 8 ms
Spin	5/2
Quadrupole Moment
Discovery Year	1992
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	2.1%

¹¹⁴Tc

Mass Number	114
Neutron Number	71
Relative Atomic Mass	113.93709 ± 0.000465 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	121 ± 9 ms
Spin	5
Quadrupole Moment
Discovery Year	1994
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	1.3%

¹¹⁵Tc

Mass Number	115
Neutron Number	72
Relative Atomic Mass	114.9401 ± 0.00021 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	78 ± 2 ms
Spin	5/2
Quadrupole Moment
Discovery Year	1994
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)

¹¹⁶Tc

Mass Number	116
Neutron Number	73
Relative Atomic Mass	115.94502 ± 0.00032 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	57 ± 3 ms
Spin	2
Quadrupole Moment
Discovery Year	1997
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

¹¹⁷Tc

Mass Number	117
Neutron Number	74
Relative Atomic Mass	116.94832 ± 0.000429 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	44.5 ± 3 ms
Spin	5/2
Quadrupole Moment
Discovery Year	1997
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

¹¹⁸Tc

Mass Number	118
Neutron Number	75
Relative Atomic Mass	117.953526 ± 0.000429 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	30 ± 4 ms
Spin	2
Quadrupole Moment
Discovery Year	2010
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

¹¹⁹Tc

Mass Number	119
Neutron Number	76
Relative Atomic Mass	118.956876 ± 0.000537 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	22 ± 3 ms
Spin	5/2
Quadrupole Moment
Discovery Year	2010
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

¹²⁰Tc

Mass Number	120
Neutron Number	77
Relative Atomic Mass	119.962426 ± 0.000537 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	21 ± 5 ms
Spin	3
Quadrupole Moment
Discovery Year	2010
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

¹²¹Tc

Mass Number	121
Neutron Number	78
Relative Atomic Mass	120.96614 ± 0.000537 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	22 ± 6 ms
Spin	5/2
Quadrupole Moment
Discovery Year	2015
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

¹²²Tc

Mass Number	122
Neutron Number	79
Relative Atomic Mass	121.97176 ± 0.000322 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life
Spin	1
Quadrupole Moment
Discovery Year	2018
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

History

Element 43 was predicted on the basis of the periodic table, and was erroneously reported as having been discovered in 1925, at which time it was named masurium. The element was actually discovered by Carlo Perrier and Emilio Segrè in 1937. It was also found in a sample of molybdenum sent by Ernest Lawrence that was bombarded by deuterons in the Berkeley cyclotron. From the Greek word technetos, artificial

Discoverers	Carlo Perrier, Émillo Segrè
Discovery Location	Italy
Discovery Year	1937
Etymology (Name Origin)	Greek: technêtos (artificial).
Pronunciation	tek-NEE-shi-em (English)

Technetium is harmful due to its radioactivity

Technetium was the first element to be produced artificially

Uses

Technetium is used in nuclear medicine to carry out a number of medical tests, mainly relating to imaging and functional studies of internal bodily organs like bone scan. It is also used industrially for equipment calibration following its approval as a standard beta emitter. Mild carbon steels may be effectively protected by minute quantities of technetium, but this corrosion protection is limited to closed systems because of technetium's radioactivity. Added to iron in quantities as low as 55 part-per-million transforms the iron into a corrosion-resistant alloy.

Sources

Made first by bombarding molybdenum with deuterons (heavy hydrogen) in a cyclotron.

Abundance
Abundance in Earth's crust
Natural Abundance (Oceans)
Natural Abundance (Human Body)	0 %
Natural Abundance (Meteor)	0 %
Natural Abundance (Sun)	0 %
Abundance in Universe	0 %

Nuclear Screening Constants

1	s	0.891
2	p	4.0592
2	s	11.3718
3	d	14.647
3	p	16.6159
3	s	16.2088
4	d	30.118
4	p	27.1888
4	s	25.8016
5	s	35.7735

Also Known As

Tc
element 43
43Tc
masurium
panormium
eka-manganese

Translations

Norwegian Bokmåltechnetium
Russianтехнеций
Italiantecnezio
Frenchtechnétium
GermanTechnetium
Polishtechnet
Dutchtechnetium
Norwegian Nynorsktechnetium
Danishtechnetium
Swedishteknetium
WelshTechnetiwm
Hungariantechnécium
Afrikaanstegnesium
Amharicቴክኔቲየም
AragoneseTecnecio
Arabicتكنيشيوم
AzerbaijaniTexnesium
BelarusianТэхнецый
Bulgarianтехнеций
Banglaটেকনেশিয়াম
BretonTeknetiom
Bosniantehnecij
Catalantecneci
CorsicanTecneziu
Czechtechnecium
ChuvashТехнеци
Greekτεχνήτιο
Esperantoteknecio
Spanishtecnecio
EstonianTehneetsium
Basqueteknezio
Persianتکنسیم
Finnishteknetium
FriulianTecnezi
IrishTeicnéitiam
GalicianTecnecio
ManxÇheghnaiçhum
Hakka Chinesetechnetium
Hebrewטכנציום
Hindiटेक्निशियम
Fiji HindiTechnetium
CroatianTehnecij
Haitian CreoleTèknesyòm
Armenianտեխնեցիում
Interlinguatechnetium
Indonesianteknesium
Idoteknecio
Icelandicteknetín
Japaneseテクネチウム
Lojbanrunjinme
Georgianტექნეციუმი
Kannadaಟೆಕ್ನೀಶಿಯಮ್
Korean테크네튬
KurdishTeknesyûm
KomiТехнеций
Latintechnetium
LuxembourgishTechnetium
LigurianTecnesio
LithuanianTechnecis
Latviantehnēcijs
Malayalamടെക്നീഷ്യം
Marathiटेक्नेटियम
Western MariТехнеций
MalayTeknetium
OccitanTecnèci
Punjabiਟੈਕਨੀਸ਼ੀਅਮ
pnbٹیکنیٹیم
Portuguesetecnécio
QuechuaTeknesyu
Romaniantechnețiu
Sicilianticnezziu
Serbo-CroatianTehnicijum
Slovaktechnécium
SlovenianTehnecij
Serbianтехнецијум
Saterland FrisianTechnetium
SwahiliTekineti
Tamilடெக்னீசியம்
Teluguటెక్నీషియమ్
Thaiเทคนีเชียม
TurkishTeknesyum
Uyghurتېخېتىسىي
Ukrainianтехнецій
UzbekTexnetsiy
VepsTehnecii
Vietnamesetecneti
WarayTecnesyo
KalmykТехнециүм
YorubaTechnetium
Chinese锝
KazakhТехнеций
CebuanoTeknesyo
Macedonianтехнециум
Central Kurdishتێکنیشیۆم
Gujaratiટેક્નેશિયમ
Odiaଟେକ୍ନିସିଅମ
ScotsTechnetium
TatarТехнеций
PiedmonteseTecnessi
SomaliTeknetiyaam
Newariटेक्नेसियम
Cantonese鎝
Belarusian (Taraskievica orthography)тэхнэц
AlbanianTeknetiumi
Literary Chinese鍀
AromanianTehnețiu
KyrgyzТехнеций
Burmeseတက္ကနက်တီယမ်
Paliटेक्नेसियम
Sanskritटेक्नेसियम
LombardTecnesio
Malteseteknezju
Scottish GaelicTeicnetium
Portuguese (Brazil)tecnécio
LimburgishTechnetium
cdoTechnetium
Min Nan ChineseTechnetium
AsturianTecneciu
Bhojpuriटेक्नेसियम
Mongolianтехнеци
Tibetanཊེག་ནི་ཤིམ།
TagalogTechnetium
Tajikтехнеций
oloTehnecii
kbpTɛkɩnɛsɩyɔm
Lingua Franca Novatecnesio
Northern FrisianTechnetium
Volapükteknetin
Nepaliटेक्निशियम
Chinese (Traditional)鎝
Chinese (Taiwan)鎝
Yiddishטעכנעטיום
Chinese (Simplified)锝
Chinese (China)锝
Chinese (Singapore)锝
Chinese (Malaysia)锝
Chinese (Hong Kong SAR China)鍀
Chinese (Macao SAR China)鍀
Wu Chinese锝
SardinianTecnètziu
KotavaTcetiel
Moroccan Arabicطيكنيتيوم
BashkirТехнеций
Egyptian Arabicتكنيشيوم
Pashtoټېکنېټيوم
CornishTeknetiom
BalineseTéknésium
bclTeknesyo
Urduٹیکنیشیئم
ZuluUmThanyambi

Technetium on ChemicalAid

Australian Educational Vocabulary ID	scot/3581
BNCF Thesaurus ID	3496
Bibliothèque nationale de France ID	121508612
Brockhaus Enzyklopädie online ID	technetium
CAB ID	257934
CAS Registry Number	7440-26-8
CPV Supplementary	AA20
ChEBI ID	33353
ChemSpider ID	22396
Common Procurement Vocabulary	14742000
DSSTOX compound identifier	DTXCID1047655
DSSTox substance ID	DTXSID5075028
DeCS ID	29561
Den Store Danske ID	technetium
ECHA Substance Infocard ID	100.028.305
Encyclopædia Britannica Online ID	science/technetium
Encyclopædia Universalis ID	technetium
Freebase ID	/m/025sk5f
GND ID	4184557-2
Gran Enciclopèdia Catalana ID	0145200
Great Russian Encyclopedia Online ID	4190712
HSDB ID	7542
InChI	InChI=1S/Tc
InChIKey	GKLVYJBZJHMRIY-UHFFFAOYSA-N
KBpedia ID	Technetium
Krugosvet article	nauka_i_tehnika/himiya/TEHNETSI.html
Library of Congress authority ID	sh85133086
MeSH descriptor ID	D013667
NDL Authority ID	00572811
Namuwiki ID	테크네튬
National Library of Israel J9U ID	987007563196105171
OmegaWiki Defined Meaning	363476
OpenAlex ID	C522557706
PSH ID	5773
Probes And Drugs ID	PD094567
PubChem CID	23957
Quora topic ID	Technetium
Store medisinske leksikon ID	technetium
Store medisinske leksikon ID	technetium_-_radiologi
Store norske leksikon ID	technetium
Treccani ID	tecnezio
UK Parliament thesaurus ID	443372
USGS Thesaurus ID	1588
WordNet 3.1 Synset ID	14681226-n
YSO ID	39264

Technetium (Tc)

Properties

Isotopes of Technetium

83Tc

84Tc

85Tc

86Tc

87Tc

88Tc

89Tc

90Tc

91Tc

92Tc

93Tc

94Tc

95Tc

96Tc

97Tc

98Tc

99Tc

100Tc

101Tc

102Tc

103Tc

104Tc

105Tc

106Tc

107Tc

108Tc

109Tc

110Tc

111Tc

112Tc

113Tc

114Tc

115Tc

116Tc

117Tc

118Tc

119Tc

120Tc

121Tc

122Tc